Kireev, I. R.; Kantor, E. A.; Valitov, R. B.; Rakhmankulov, D. L.
Journal of Organic Chemistry USSR (English Translation), 1981 , p. 1366 - 1368
Zhurnal Organicheskoi Khimii, 1981 , vol. 17, # 7 p. 1536 - 1539